Description: This function allows the user to create and/or modify the SPC (single point constraint) options that constrain nodes in six degrees of freedom.
Usage:
1. DSI displays a list of additional commands in the options area:
2. Each of these commands is described in the following pages.
Description: This function creates a new SPC set. The SPC set may be used later for subcase definition.
Usage:
1. When the user enters CREATE/SPC, DSI prompts:
> ENTER SPC SET NUMBER (= XXXX) OR -1 TO EXIT
• The user must enter an integer before proceeding.
2. After the user enters SPC set number, DSI prompts:
> DEFINE D.O.F. FOR SPC
Simultaneously, the SPC DEGREE OF FREEDOM box pops up and as following:
The options in the top and bottom of the SPC DEGREE OF FREEDOM box represent alternate methods for defining the degree of freedom. Only the top or the bottom can be selected, not both.
X-Y SYMMETRY • Assigns symmetric boundary conditions to the XY plane.
Y-Z SYMMETRY • Assigns symmetric boundary conditions to the YZ plane.
X-Z SYMMETRY • Assigns symmetric boundary conditions to the XZ plane.
X-Y ANTI-SYMMETRY • Assigns asymmetric boundary conditions to the XY plane.
Y-Z ANTI-SYMMETRY • Assigns asymmetric boundary conditions to the YZ plane.
X-Z ANTI-SYMMETRY • Assigns asymmetric boundary conditions to the XZ plane.
X 每 TRANSLATION • X-translation will be constrained.
Y 每 TRANSLATION • Y-translation will be constrained.
Z 每 TRANSLATION • Z-translation will be constrained.
X 每 ROTATION • X-rotation will be constrained.
Y 每 ROTATION • Y-rotation will be constrained.
Z 每 ROTATION • Z-rotation will be constrained.
3. Once the DOF is determined in the dialogue box, DSI prompts:
> D.O.F. xxxx IS FIXED
> ENTER ENFORCED DISPLACEMENT, DEFAULT IS 0.0
4. DSI prompts:
> SELECT NODES
• Nodes may be selected one at a time with the left mouse button.
• DONE will exit the user to the ENTER SPC SET NUMBER prompt (step 1).
• ABORT will exit the user to the SPC OPTIONS menu without constraining any of the selected grids.
Description: This function deletes the selected SPC set.
Usage:
1. DSI prompts:
> PICK &SPC* TO DELETE
• All available SPC sets are displayed for selection in the BOUNDARY SPC SET box.
2. When a SPC set has been selected for deletion, DSI prompts:
> ONE SPC SET IS SELECTED
• EXIT deletes the SPC set and the user exits the function DELETE.
Description: This function adds additional nodes into the selected boundary SPC set.
Usage:
1. DSI prompts:
> PICK A BOUNDARY SPC SET TO ADD NODES
2. DSI prompts:
> SELECT NODES
• DONE will add nodes into the SPC set, and the user exits the function INCLUDE NODES IN SET.
• ABORT will exit the function INCLUDE NODES IN SET without adding any of the selected grids.
Description: This function lists the defined sets in a pop-up window.
Usage:
1. DSI prompts:
> LIST SET ONLY, EXIT TO CONTINUE
Description: This function allows the user to simultaneously delete and recreate any boundary SPC set.
Usage:
1. DSI prompts:
> PICK &SPC* TO MODIFY
2. After the user selects a boundary SPC set, the BOUNDARY SPC DEFINITION window pops up and the user may modify parameters in the window.
Description: This function deletes nodes from the selected boundary SPC set.
Usage:
1. DSI prompts:
> PICK A BOUNDARY SPC SET TO REMOVE NODES
2. DSI prompts:
> SELECT NODES
• DONE will release nodes from the SPC set, and the user exits the function REMOVE NODES IN SET.
• ABORT will exit the function REMOVE NODES IN SET without releasing any of the selected grids.
Description: This function allows the user to display all or some of the defined SPC sets. DSI displays D.O.F. next to each node.
Usage:
1. DSI prompts:
> PICK &SPC* TO SHOW
? [List of all SPC sets]
CURSOR AT NODE
WINDOW
MULTI-PT REGION
SELECT ALL
UNDO ALL
EXIT